Consolidate null_sha1[].
[git/git.git] / apply.c
CommitLineData
c1bb9350
LT
1/*
2 * apply.c
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 *
6 * This applies patches on top of some (arbitrary) version of the SCM.
7 *
8 * NOTE! It does all its work in the index file, and only cares about
9 * the files in the working directory if you tell it to "merge" the
10 * patch apply.
11 *
12 * Even when merging it always takes the source from the index, and
13 * uses the working tree as a "branch" for a 3-way merge.
14 */
15#include <ctype.h>
d854f783 16#include <fnmatch.h>
c1bb9350
LT
17#include "cache.h"
18
19// We default to the merge behaviour, since that's what most people would
a577284a
LT
20// expect.
21//
22// --check turns on checking that the working tree matches the
23// files that are being modified, but doesn't apply the patch
24// --stat does just a diffstat, and doesn't actually apply
25// --show-files shows the directory changes
26//
c1bb9350 27static int merge_patch = 1;
3cca928d 28static int check_index = 0;
5aa7d94c 29static int write_index = 0;
fab2c257 30static int diffstat = 0;
96c912a4 31static int summary = 0;
a577284a
LT
32static int check = 0;
33static int apply = 1;
34static int show_files = 0;
12dd6e8c
JH
35static const char apply_usage[] =
36"git-apply [--no-merge] [--stat] [--summary] [--check] [--index] [--apply] [--show-files] <patch>...";
c1bb9350 37
3f40315a
LT
38/*
39 * For "diff-stat" like behaviour, we keep track of the biggest change
40 * we've seen, and the longest filename. That allows us to do simple
41 * scaling.
42 */
43static int max_change, max_len;
44
a4acb0eb
LT
45/*
46 * Various "current state", notably line numbers and what
47 * file (and how) we're patching right now.. The "is_xxxx"
48 * things are flags, where -1 means "don't know yet".
49 */
46979f56 50static int linenr = 1;
19c58fb8
LT
51
52struct fragment {
53 unsigned long oldpos, oldlines;
54 unsigned long newpos, newlines;
55 const char *patch;
56 int size;
57 struct fragment *next;
58};
59
60struct patch {
5041aa70 61 char *new_name, *old_name, *def_name;
19c58fb8
LT
62 unsigned int old_mode, new_mode;
63 int is_rename, is_copy, is_new, is_delete;
3f40315a 64 int lines_added, lines_deleted;
96c912a4 65 int score;
19c58fb8 66 struct fragment *fragments;
5aa7d94c 67 char *result;
3cca928d 68 unsigned long resultsize;
19c58fb8
LT
69 struct patch *next;
70};
46979f56 71
c1bb9350 72#define CHUNKSIZE (8192)
a4acb0eb 73#define SLOP (16)
c1bb9350
LT
74
75static void *read_patch_file(int fd, unsigned long *sizep)
76{
77 unsigned long size = 0, alloc = CHUNKSIZE;
78 void *buffer = xmalloc(alloc);
79
80 for (;;) {
81 int nr = alloc - size;
82 if (nr < 1024) {
83 alloc += CHUNKSIZE;
84 buffer = xrealloc(buffer, alloc);
85 nr = alloc - size;
86 }
87 nr = read(fd, buffer + size, nr);
88 if (!nr)
89 break;
90 if (nr < 0) {
91 if (errno == EAGAIN)
92 continue;
93 die("git-apply: read returned %s", strerror(errno));
94 }
95 size += nr;
96 }
97 *sizep = size;
a4acb0eb
LT
98
99 /*
100 * Make sure that we have some slop in the buffer
101 * so that we can do speculative "memcmp" etc, and
102 * see to it that it is NUL-filled.
103 */
104 if (alloc < size + SLOP)
105 buffer = xrealloc(buffer, size + SLOP);
106 memset(buffer + size, 0, SLOP);
c1bb9350
LT
107 return buffer;
108}
109
3cca928d 110static unsigned long linelen(const char *buffer, unsigned long size)
c1bb9350
LT
111{
112 unsigned long len = 0;
113 while (size--) {
114 len++;
115 if (*buffer++ == '\n')
116 break;
117 }
118 return len;
119}
120
a4acb0eb
LT
121static int is_dev_null(const char *str)
122{
123 return !memcmp("/dev/null", str, 9) && isspace(str[9]);
124}
125
381ca9a3
LT
126#define TERM_SPACE 1
127#define TERM_TAB 2
9a4a100e
LT
128
129static int name_terminate(const char *name, int namelen, int c, int terminate)
130{
131 if (c == ' ' && !(terminate & TERM_SPACE))
132 return 0;
133 if (c == '\t' && !(terminate & TERM_TAB))
134 return 0;
135
9a4a100e
LT
136 return 1;
137}
138
139static char * find_name(const char *line, char *def, int p_value, int terminate)
c1bb9350 140{
a4acb0eb
LT
141 int len;
142 const char *start = line;
143 char *name;
144
c1bb9350 145 for (;;) {
a4acb0eb 146 char c = *line;
9a4a100e
LT
147
148 if (isspace(c)) {
149 if (c == '\n')
150 break;
151 if (name_terminate(start, line-start, c, terminate))
152 break;
153 }
a4acb0eb
LT
154 line++;
155 if (c == '/' && !--p_value)
156 start = line;
157 }
158 if (!start)
159 return def;
160 len = line - start;
161 if (!len)
162 return def;
163
164 /*
165 * Generally we prefer the shorter name, especially
166 * if the other one is just a variation of that with
167 * something else tacked on to the end (ie "file.orig"
168 * or "file~").
169 */
170 if (def) {
171 int deflen = strlen(def);
172 if (deflen < len && !strncmp(start, def, deflen))
173 return def;
c1bb9350 174 }
a4acb0eb
LT
175
176 name = xmalloc(len + 1);
177 memcpy(name, start, len);
178 name[len] = 0;
179 free(def);
180 return name;
181}
182
183/*
184 * Get the name etc info from the --/+++ lines of a traditional patch header
185 *
186 * NOTE! This hardcodes "-p1" behaviour in filename detection.
9a4a100e
LT
187 *
188 * FIXME! The end-of-filename heuristics are kind of screwy. For existing
189 * files, we can happily check the index for a match, but for creating a
190 * new file we should try to match whatever "patch" does. I have no idea.
a4acb0eb 191 */
19c58fb8 192static void parse_traditional_patch(const char *first, const char *second, struct patch *patch)
a4acb0eb
LT
193{
194 int p_value = 1;
195 char *name;
196
197 first += 4; // skip "--- "
198 second += 4; // skip "+++ "
199 if (is_dev_null(first)) {
19c58fb8
LT
200 patch->is_new = 1;
201 patch->is_delete = 0;
5041aa70 202 name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB);
19c58fb8 203 patch->new_name = name;
a4acb0eb 204 } else if (is_dev_null(second)) {
19c58fb8
LT
205 patch->is_new = 0;
206 patch->is_delete = 1;
381ca9a3 207 name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
19c58fb8 208 patch->old_name = name;
a4acb0eb 209 } else {
381ca9a3
LT
210 name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
211 name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
19c58fb8 212 patch->old_name = patch->new_name = name;
a4acb0eb
LT
213 }
214 if (!name)
215 die("unable to find filename in patch at line %d", linenr);
a4acb0eb
LT
216}
217
19c58fb8 218static int gitdiff_hdrend(const char *line, struct patch *patch)
a4acb0eb
LT
219{
220 return -1;
221}
222
1e3f6b6e
LT
223/*
224 * We're anal about diff header consistency, to make
225 * sure that we don't end up having strange ambiguous
226 * patches floating around.
227 *
228 * As a result, gitdiff_{old|new}name() will check
229 * their names against any previous information, just
230 * to make sure..
231 */
232static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
233{
234 int len;
235 const char *name;
236
237 if (!orig_name && !isnull)
238 return find_name(line, NULL, 1, 0);
239
240 name = "/dev/null";
241 len = 9;
242 if (orig_name) {
243 name = orig_name;
244 len = strlen(name);
245 if (isnull)
246 die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
247 }
248
249 if (*name == '/')
250 goto absolute_path;
251
252 for (;;) {
253 char c = *line++;
254 if (c == '\n')
255 break;
256 if (c != '/')
257 continue;
258absolute_path:
259 if (memcmp(line, name, len) || line[len] != '\n')
260 break;
261 return orig_name;
262 }
263 die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
264 return NULL;
265}
266
19c58fb8 267static int gitdiff_oldname(const char *line, struct patch *patch)
a4acb0eb 268{
19c58fb8 269 patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old");
a4acb0eb
LT
270 return 0;
271}
272
19c58fb8 273static int gitdiff_newname(const char *line, struct patch *patch)
a4acb0eb 274{
19c58fb8 275 patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new");
a4acb0eb
LT
276 return 0;
277}
278
19c58fb8 279static int gitdiff_oldmode(const char *line, struct patch *patch)
a4acb0eb 280{
19c58fb8 281 patch->old_mode = strtoul(line, NULL, 8);
a4acb0eb
LT
282 return 0;
283}
284
19c58fb8 285static int gitdiff_newmode(const char *line, struct patch *patch)
a4acb0eb 286{
19c58fb8 287 patch->new_mode = strtoul(line, NULL, 8);
a4acb0eb
LT
288 return 0;
289}
290
19c58fb8 291static int gitdiff_delete(const char *line, struct patch *patch)
a4acb0eb 292{
19c58fb8 293 patch->is_delete = 1;
5041aa70 294 patch->old_name = patch->def_name;
19c58fb8 295 return gitdiff_oldmode(line, patch);
a4acb0eb
LT
296}
297
19c58fb8 298static int gitdiff_newfile(const char *line, struct patch *patch)
a4acb0eb 299{
19c58fb8 300 patch->is_new = 1;
5041aa70 301 patch->new_name = patch->def_name;
19c58fb8 302 return gitdiff_newmode(line, patch);
a4acb0eb
LT
303}
304
19c58fb8 305static int gitdiff_copysrc(const char *line, struct patch *patch)
a4acb0eb 306{
19c58fb8
LT
307 patch->is_copy = 1;
308 patch->old_name = find_name(line, NULL, 0, 0);
a4acb0eb
LT
309 return 0;
310}
311
19c58fb8 312static int gitdiff_copydst(const char *line, struct patch *patch)
a4acb0eb 313{
19c58fb8
LT
314 patch->is_copy = 1;
315 patch->new_name = find_name(line, NULL, 0, 0);
a4acb0eb
LT
316 return 0;
317}
318
19c58fb8 319static int gitdiff_renamesrc(const char *line, struct patch *patch)
a4acb0eb 320{
19c58fb8
LT
321 patch->is_rename = 1;
322 patch->old_name = find_name(line, NULL, 0, 0);
a4acb0eb
LT
323 return 0;
324}
325
19c58fb8 326static int gitdiff_renamedst(const char *line, struct patch *patch)
a4acb0eb 327{
19c58fb8
LT
328 patch->is_rename = 1;
329 patch->new_name = find_name(line, NULL, 0, 0);
a4acb0eb
LT
330 return 0;
331}
332
19c58fb8 333static int gitdiff_similarity(const char *line, struct patch *patch)
a4acb0eb 334{
96c912a4
JH
335 if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
336 patch->score = 0;
a4acb0eb 337 return 0;
c1bb9350
LT
338}
339
70aadac0
JH
340static int gitdiff_dissimilarity(const char *line, struct patch *patch)
341{
96c912a4
JH
342 if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
343 patch->score = 0;
70aadac0
JH
344 return 0;
345}
346
9a4a100e
LT
347/*
348 * This is normal for a diff that doesn't change anything: we'll fall through
349 * into the next diff. Tell the parser to break out.
350 */
19c58fb8 351static int gitdiff_unrecognized(const char *line, struct patch *patch)
9a4a100e
LT
352{
353 return -1;
354}
355
5041aa70
LT
356static char *git_header_name(char *line)
357{
358 int len;
359 char *name, *second;
360
361 /*
362 * Find the first '/'
363 */
364 name = line;
365 for (;;) {
366 char c = *name++;
367 if (c == '\n')
368 return NULL;
369 if (c == '/')
370 break;
371 }
372
373 /*
374 * We don't accept absolute paths (/dev/null) as possibly valid
375 */
376 if (name == line+1)
377 return NULL;
378
379 /*
380 * Accept a name only if it shows up twice, exactly the same
381 * form.
382 */
383 for (len = 0 ; ; len++) {
384 char c = name[len];
385
386 switch (c) {
387 default:
388 continue;
389 case '\n':
e70a165d 390 return NULL;
5041aa70
LT
391 case '\t': case ' ':
392 second = name+len;
393 for (;;) {
394 char c = *second++;
395 if (c == '\n')
396 return NULL;
397 if (c == '/')
398 break;
399 }
0e87e048 400 if (second[len] == '\n' && !memcmp(name, second, len)) {
5041aa70
LT
401 char *ret = xmalloc(len + 1);
402 memcpy(ret, name, len);
403 ret[len] = 0;
404 return ret;
405 }
406 }
407 }
408 return NULL;
409}
410
c1bb9350 411/* Verify that we recognize the lines following a git header */
19c58fb8 412static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch)
c1bb9350 413{
a4acb0eb
LT
414 unsigned long offset;
415
416 /* A git diff has explicit new/delete information, so we don't guess */
19c58fb8
LT
417 patch->is_new = 0;
418 patch->is_delete = 0;
a4acb0eb 419
5041aa70
LT
420 /*
421 * Some things may not have the old name in the
422 * rest of the headers anywhere (pure mode changes,
423 * or removing or adding empty files), so we get
424 * the default name from the header.
425 */
426 patch->def_name = git_header_name(line + strlen("diff --git "));
427
a4acb0eb
LT
428 line += len;
429 size -= len;
430 linenr++;
431 for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) {
432 static const struct opentry {
433 const char *str;
19c58fb8 434 int (*fn)(const char *, struct patch *);
a4acb0eb
LT
435 } optable[] = {
436 { "@@ -", gitdiff_hdrend },
437 { "--- ", gitdiff_oldname },
438 { "+++ ", gitdiff_newname },
439 { "old mode ", gitdiff_oldmode },
440 { "new mode ", gitdiff_newmode },
441 { "deleted file mode ", gitdiff_delete },
442 { "new file mode ", gitdiff_newfile },
443 { "copy from ", gitdiff_copysrc },
444 { "copy to ", gitdiff_copydst },
33f4d087
LT
445 { "rename old ", gitdiff_renamesrc },
446 { "rename new ", gitdiff_renamedst },
dc938417
LT
447 { "rename from ", gitdiff_renamesrc },
448 { "rename to ", gitdiff_renamedst },
a4acb0eb 449 { "similarity index ", gitdiff_similarity },
70aadac0 450 { "dissimilarity index ", gitdiff_dissimilarity },
9a4a100e 451 { "", gitdiff_unrecognized },
a4acb0eb
LT
452 };
453 int i;
c1bb9350 454
c1bb9350 455 len = linelen(line, size);
a4acb0eb 456 if (!len || line[len-1] != '\n')
c1bb9350 457 break;
a4acb0eb
LT
458 for (i = 0; i < sizeof(optable) / sizeof(optable[0]); i++) {
459 const struct opentry *p = optable + i;
460 int oplen = strlen(p->str);
461 if (len < oplen || memcmp(p->str, line, oplen))
462 continue;
19c58fb8 463 if (p->fn(line + oplen, patch) < 0)
a4acb0eb 464 return offset;
9a4a100e 465 break;
a4acb0eb 466 }
c1bb9350
LT
467 }
468
a4acb0eb 469 return offset;
c1bb9350
LT
470}
471
fab2c257 472static int parse_num(const char *line, unsigned long *p)
46979f56
LT
473{
474 char *ptr;
fab2c257
LT
475
476 if (!isdigit(*line))
477 return 0;
478 *p = strtoul(line, &ptr, 10);
479 return ptr - line;
480}
481
482static int parse_range(const char *line, int len, int offset, const char *expect,
483 unsigned long *p1, unsigned long *p2)
484{
46979f56
LT
485 int digits, ex;
486
487 if (offset < 0 || offset >= len)
488 return -1;
489 line += offset;
490 len -= offset;
491
fab2c257
LT
492 digits = parse_num(line, p1);
493 if (!digits)
46979f56 494 return -1;
46979f56
LT
495
496 offset += digits;
497 line += digits;
498 len -= digits;
499
fab2c257
LT
500 *p2 = *p1;
501 if (*line == ',') {
502 digits = parse_num(line+1, p2);
503 if (!digits)
504 return -1;
505
506 offset += digits+1;
507 line += digits+1;
508 len -= digits+1;
509 }
510
46979f56
LT
511 ex = strlen(expect);
512 if (ex > len)
513 return -1;
514 if (memcmp(line, expect, ex))
515 return -1;
516
517 return offset + ex;
518}
519
520/*
521 * Parse a unified diff fragment header of the
522 * form "@@ -a,b +c,d @@"
523 */
19c58fb8 524static int parse_fragment_header(char *line, int len, struct fragment *fragment)
46979f56
LT
525{
526 int offset;
527
528 if (!len || line[len-1] != '\n')
529 return -1;
530
531 /* Figure out the number of lines in a fragment */
fab2c257
LT
532 offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
533 offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
46979f56
LT
534
535 return offset;
536}
537
19c58fb8 538static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch)
c1bb9350
LT
539{
540 unsigned long offset, len;
541
19c58fb8
LT
542 patch->is_rename = patch->is_copy = 0;
543 patch->is_new = patch->is_delete = -1;
544 patch->old_mode = patch->new_mode = 0;
545 patch->old_name = patch->new_name = NULL;
46979f56 546 for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) {
c1bb9350
LT
547 unsigned long nextlen;
548
549 len = linelen(line, size);
550 if (!len)
551 break;
552
553 /* Testing this early allows us to take a few shortcuts.. */
554 if (len < 6)
555 continue;
46979f56
LT
556
557 /*
558 * Make sure we don't find any unconnected patch fragmants.
559 * That's a sign that we didn't find a header, and that a
560 * patch has become corrupted/broken up.
561 */
562 if (!memcmp("@@ -", line, 4)) {
19c58fb8
LT
563 struct fragment dummy;
564 if (parse_fragment_header(line, len, &dummy) < 0)
46979f56 565 continue;
4ec99bf0 566 error("patch fragment without header at line %d: %.*s", linenr, (int)len-1, line);
46979f56
LT
567 }
568
c1bb9350
LT
569 if (size < len + 6)
570 break;
571
572 /*
573 * Git patch? It might not have a real patch, just a rename
574 * or mode change, so we handle that specially
575 */
576 if (!memcmp("diff --git ", line, 11)) {
19c58fb8 577 int git_hdr_len = parse_git_header(line, len, size, patch);
206de27e 578 if (git_hdr_len <= len)
c1bb9350 579 continue;
b7e8039a
LT
580 if (!patch->old_name && !patch->new_name) {
581 if (!patch->def_name)
582 die("git diff header lacks filename information (line %d)", linenr);
583 patch->old_name = patch->new_name = patch->def_name;
584 }
a4acb0eb 585 *hdrsize = git_hdr_len;
c1bb9350
LT
586 return offset;
587 }
588
589 /** --- followed by +++ ? */
590 if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
591 continue;
592
593 /*
594 * We only accept unified patches, so we want it to
595 * at least have "@@ -a,b +c,d @@\n", which is 14 chars
596 * minimum
597 */
598 nextlen = linelen(line + len, size - len);
599 if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
600 continue;
601
602 /* Ok, we'll consider it a patch */
19c58fb8 603 parse_traditional_patch(line, line+len, patch);
c1bb9350 604 *hdrsize = len + nextlen;
46979f56 605 linenr += 2;
c1bb9350
LT
606 return offset;
607 }
608 return -1;
609}
610
c1bb9350
LT
611/*
612 * Parse a unified diff. Note that this really needs
613 * to parse each fragment separately, since the only
614 * way to know the difference between a "---" that is
615 * part of a patch, and a "---" that starts the next
616 * patch is to look at the line counts..
617 */
19c58fb8 618static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment)
c1bb9350 619{
3f40315a 620 int added, deleted;
c1bb9350 621 int len = linelen(line, size), offset;
30996652 622 unsigned long oldlines, newlines;
c1bb9350 623
19c58fb8 624 offset = parse_fragment_header(line, len, fragment);
c1bb9350
LT
625 if (offset < 0)
626 return -1;
19c58fb8
LT
627 oldlines = fragment->oldlines;
628 newlines = fragment->newlines;
c1bb9350 629
30996652
LT
630 if (patch->is_new < 0) {
631 patch->is_new = !oldlines;
632 if (!oldlines)
633 patch->old_name = NULL;
634 }
635 if (patch->is_delete < 0) {
636 patch->is_delete = !newlines;
637 if (!newlines)
638 patch->new_name = NULL;
639 }
640
641 if (patch->is_new != !oldlines)
642 return error("new file depends on old contents");
af3f929f
LT
643 if (patch->is_delete != !newlines) {
644 if (newlines)
645 return error("deleted file still has contents");
646 fprintf(stderr, "** warning: file %s becomes empty but is not deleted\n", patch->new_name);
647 }
a4acb0eb 648
c1bb9350
LT
649 /* Parse the thing.. */
650 line += len;
651 size -= len;
46979f56 652 linenr++;
3f40315a 653 added = deleted = 0;
46979f56 654 for (offset = len; size > 0; offset += len, size -= len, line += len, linenr++) {
c1bb9350
LT
655 if (!oldlines && !newlines)
656 break;
657 len = linelen(line, size);
658 if (!len || line[len-1] != '\n')
659 return -1;
660 switch (*line) {
661 default:
662 return -1;
663 case ' ':
664 oldlines--;
665 newlines--;
666 break;
667 case '-':
3f40315a 668 deleted++;
c1bb9350
LT
669 oldlines--;
670 break;
671 case '+':
3f40315a 672 added++;
c1bb9350
LT
673 newlines--;
674 break;
433ef8a2
FK
675
676 /* We allow "\ No newline at end of file". Depending
677 * on locale settings when the patch was produced we
678 * don't know what this line looks like. The only
679 * thing we do know is that it begins with "\ ". */
fab2c257 680 case '\\':
433ef8a2 681 if (len < 12 || memcmp(line, "\\ ", 2))
3cca928d 682 return -1;
fab2c257 683 break;
c1bb9350
LT
684 }
685 }
8b64647d
JH
686 /* If a fragment ends with an incomplete line, we failed to include
687 * it in the above loop because we hit oldlines == newlines == 0
688 * before seeing it.
689 */
433ef8a2 690 if (12 < size && !memcmp(line, "\\ ", 2))
8b64647d
JH
691 offset += linelen(line, size);
692
3f40315a
LT
693 patch->lines_added += added;
694 patch->lines_deleted += deleted;
c1bb9350
LT
695 return offset;
696}
697
19c58fb8 698static int parse_single_patch(char *line, unsigned long size, struct patch *patch)
c1bb9350
LT
699{
700 unsigned long offset = 0;
19c58fb8 701 struct fragment **fragp = &patch->fragments;
c1bb9350
LT
702
703 while (size > 4 && !memcmp(line, "@@ -", 4)) {
19c58fb8
LT
704 struct fragment *fragment;
705 int len;
706
707 fragment = xmalloc(sizeof(*fragment));
708 memset(fragment, 0, sizeof(*fragment));
709 len = parse_fragment(line, size, patch, fragment);
c1bb9350 710 if (len <= 0)
46979f56 711 die("corrupt patch at line %d", linenr);
c1bb9350 712
19c58fb8
LT
713 fragment->patch = line;
714 fragment->size = len;
715
716 *fragp = fragment;
717 fragp = &fragment->next;
c1bb9350
LT
718
719 offset += len;
720 line += len;
721 size -= len;
722 }
723 return offset;
724}
725
19c58fb8 726static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
c1bb9350
LT
727{
728 int hdrsize, patchsize;
19c58fb8 729 int offset = find_header(buffer, size, &hdrsize, patch);
c1bb9350
LT
730
731 if (offset < 0)
732 return offset;
c1bb9350 733
19c58fb8 734 patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch);
c1bb9350
LT
735
736 return offset + hdrsize + patchsize;
737}
738
6da4016a
LT
739static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
740static const char minuses[]= "----------------------------------------------------------------------";
3f40315a
LT
741
742static void show_stats(struct patch *patch)
743{
62917097 744 const char *prefix = "";
03b4538b 745 char *name = patch->new_name;
95bedc9e 746 int len, max, add, del, total;
3f40315a 747
5041aa70 748 if (!name)
03b4538b 749 name = patch->old_name;
3f40315a
LT
750
751 /*
752 * "scale" the filename
753 */
754 len = strlen(name);
755 max = max_len;
756 if (max > 50)
757 max = 50;
62917097
LT
758 if (len > max) {
759 char *slash;
760 prefix = "...";
761 max -= 3;
3f40315a 762 name += len - max;
62917097
LT
763 slash = strchr(name, '/');
764 if (slash)
765 name = slash;
766 }
3f40315a
LT
767 len = max;
768
769 /*
770 * scale the add/delete
771 */
772 max = max_change;
773 if (max + len > 70)
774 max = 70 - len;
95bedc9e
LT
775
776 add = patch->lines_added;
777 del = patch->lines_deleted;
778 total = add + del;
779
69f956e1
SV
780 if (max_change > 0) {
781 total = (total * max + max_change / 2) / max_change;
782 add = (add * max + max_change / 2) / max_change;
783 del = total - add;
784 }
62917097 785 printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
3f40315a
LT
786 len, name, patch->lines_added + patch->lines_deleted,
787 add, pluses, del, minuses);
788}
789
3cca928d
LT
790static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size)
791{
792 int fd;
793 unsigned long got;
794
795 switch (st->st_mode & S_IFMT) {
796 case S_IFLNK:
797 return readlink(path, buf, size);
798 case S_IFREG:
799 fd = open(path, O_RDONLY);
800 if (fd < 0)
801 return error("unable to open %s", path);
802 got = 0;
803 for (;;) {
804 int ret = read(fd, buf + got, size - got);
805 if (ret < 0) {
806 if (errno == EAGAIN)
807 continue;
808 break;
809 }
810 if (!ret)
811 break;
812 got += ret;
813 }
814 close(fd);
815 return got;
816
817 default:
818 return -1;
819 }
820}
821
822static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line)
823{
6e7c92a9
LT
824 int i;
825 unsigned long start, backwards, forwards;
3cca928d
LT
826
827 if (fragsize > size)
828 return -1;
829
830 start = 0;
831 if (line > 1) {
3cca928d 832 unsigned long offset = 0;
6e7c92a9
LT
833 i = line-1;
834 while (offset + fragsize <= size) {
3cca928d
LT
835 if (buf[offset++] == '\n') {
836 start = offset;
6e7c92a9 837 if (!--i)
3cca928d
LT
838 break;
839 }
840 }
841 }
842
843 /* Exact line number? */
844 if (!memcmp(buf + start, fragment, fragsize))
845 return start;
846
6e7c92a9
LT
847 /*
848 * There's probably some smart way to do this, but I'll leave
849 * that to the smart and beautiful people. I'm simple and stupid.
850 */
851 backwards = start;
852 forwards = start;
853 for (i = 0; ; i++) {
854 unsigned long try;
855 int n;
856
857 /* "backward" */
858 if (i & 1) {
859 if (!backwards) {
860 if (forwards + fragsize > size)
861 break;
862 continue;
863 }
864 do {
865 --backwards;
866 } while (backwards && buf[backwards-1] != '\n');
867 try = backwards;
868 } else {
869 while (forwards + fragsize <= size) {
870 if (buf[forwards++] == '\n')
871 break;
872 }
873 try = forwards;
874 }
875
876 if (try + fragsize > size)
877 continue;
878 if (memcmp(buf + try, fragment, fragsize))
879 continue;
880 n = (i >> 1)+1;
881 if (i & 1)
882 n = -n;
6e7c92a9
LT
883 return try;
884 }
885
3cca928d
LT
886 /*
887 * We should start searching forward and backward.
888 */
889 return -1;
890}
891
6e7c92a9
LT
892struct buffer_desc {
893 char *buffer;
894 unsigned long size;
895 unsigned long alloc;
896};
897
898static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
3cca928d 899{
6e7c92a9 900 char *buf = desc->buffer;
3cca928d
LT
901 const char *patch = frag->patch;
902 int offset, size = frag->size;
903 char *old = xmalloc(size);
904 char *new = xmalloc(size);
905 int oldsize = 0, newsize = 0;
906
907 while (size > 0) {
908 int len = linelen(patch, size);
909 int plen;
910
911 if (!len)
912 break;
913
914 /*
915 * "plen" is how much of the line we should use for
916 * the actual patch data. Normally we just remove the
917 * first character on the line, but if the line is
918 * followed by "\ No newline", then we also remove the
919 * last one (which is the newline, of course).
920 */
921 plen = len-1;
8b64647d 922 if (len < size && patch[len] == '\\')
3cca928d
LT
923 plen--;
924 switch (*patch) {
925 case ' ':
926 case '-':
927 memcpy(old + oldsize, patch + 1, plen);
928 oldsize += plen;
929 if (*patch == '-')
930 break;
931 /* Fall-through for ' ' */
932 case '+':
933 memcpy(new + newsize, patch + 1, plen);
934 newsize += plen;
935 break;
936 case '@': case '\\':
937 /* Ignore it, we already handled it */
938 break;
939 default:
940 return -1;
941 }
942 patch += len;
943 size -= len;
944 }
945
6e7c92a9 946 offset = find_offset(buf, desc->size, old, oldsize, frag->newpos);
3cca928d 947 if (offset >= 0) {
6e7c92a9
LT
948 int diff = newsize - oldsize;
949 unsigned long size = desc->size + diff;
950 unsigned long alloc = desc->alloc;
951
952 if (size > alloc) {
953 alloc = size + 8192;
954 desc->alloc = alloc;
955 buf = xrealloc(buf, alloc);
956 desc->buffer = buf;
957 }
958 desc->size = size;
959 memmove(buf + offset + newsize, buf + offset + oldsize, size - offset - newsize);
960 memcpy(buf + offset, new, newsize);
3cca928d
LT
961 offset = 0;
962 }
963
964 free(old);
965 free(new);
966 return offset;
967}
968
6e7c92a9 969static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
3cca928d
LT
970{
971 struct fragment *frag = patch->fragments;
972
973 while (frag) {
6e7c92a9 974 if (apply_one_fragment(desc, frag) < 0)
4ec99bf0 975 return error("patch failed: %s:%ld", patch->old_name, frag->oldpos);
3cca928d
LT
976 frag = frag->next;
977 }
30996652 978 return 0;
3cca928d
LT
979}
980
981static int apply_data(struct patch *patch, struct stat *st)
982{
6e7c92a9
LT
983 char *buf;
984 unsigned long size, alloc;
985 struct buffer_desc desc;
3cca928d 986
30996652
LT
987 size = 0;
988 alloc = 0;
989 buf = NULL;
990 if (patch->old_name) {
991 size = st->st_size;
992 alloc = size + 8192;
993 buf = xmalloc(alloc);
994 if (read_old_data(st, patch->old_name, buf, alloc) != size)
995 return error("read of %s failed", patch->old_name);
996 }
6e7c92a9
LT
997
998 desc.size = size;
999 desc.alloc = alloc;
1000 desc.buffer = buf;
1001 if (apply_fragments(&desc, patch) < 0)
3cca928d 1002 return -1;
6e7c92a9
LT
1003 patch->result = desc.buffer;
1004 patch->resultsize = desc.size;
5aa7d94c
LT
1005
1006 if (patch->is_delete && patch->resultsize)
1007 return error("removal patch leaves file contents");
1008
3cca928d
LT
1009 return 0;
1010}
1011
a577284a 1012static int check_patch(struct patch *patch)
fab2c257 1013{
a577284a 1014 struct stat st;
fab2c257
LT
1015 const char *old_name = patch->old_name;
1016 const char *new_name = patch->new_name;
1017
1018 if (old_name) {
a577284a
LT
1019 int changed;
1020
a577284a 1021 if (lstat(old_name, &st) < 0)
84fb9a4d 1022 return error("%s: %s", old_name, strerror(errno));
3cca928d
LT
1023 if (check_index) {
1024 int pos = cache_name_pos(old_name, strlen(old_name));
1025 if (pos < 0)
1026 return error("%s: does not exist in index", old_name);
1027 changed = ce_match_stat(active_cache[pos], &st);
1028 if (changed)
1029 return error("%s: does not match index", old_name);
1030 }
1031 if (patch->is_new < 0)
1032 patch->is_new = 0;
de4971b5 1033 st.st_mode = ntohl(create_ce_mode(st.st_mode));
a577284a
LT
1034 if (!patch->old_mode)
1035 patch->old_mode = st.st_mode;
3cca928d
LT
1036 if ((st.st_mode ^ patch->old_mode) & S_IFMT)
1037 return error("%s: wrong type", old_name);
1038 if (st.st_mode != patch->old_mode)
1039 fprintf(stderr, "warning: %s has type %o, expected %o\n",
1040 old_name, st.st_mode, patch->old_mode);
fab2c257 1041 }
a577284a 1042
fab2c257 1043 if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) {
3cca928d 1044 if (check_index && cache_name_pos(new_name, strlen(new_name)) >= 0)
a577284a
LT
1045 return error("%s: already exists in index", new_name);
1046 if (!lstat(new_name, &st))
1047 return error("%s: already exists in working directory", new_name);
1048 if (errno != ENOENT)
1049 return error("%s: %s", new_name, strerror(errno));
35cc4bcd
JS
1050 if (!patch->new_mode) {
1051 if (patch->is_new)
1052 patch->new_mode = S_IFREG | 0644;
1053 else
1054 patch->new_mode = patch->old_mode;
1055 }
fab2c257 1056 }
3cca928d
LT
1057
1058 if (new_name && old_name) {
1059 int same = !strcmp(old_name, new_name);
1060 if (!patch->new_mode)
1061 patch->new_mode = patch->old_mode;
1062 if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
1063 return error("new mode (%o) of %s does not match old mode (%o)%s%s",
1064 patch->new_mode, new_name, patch->old_mode,
1065 same ? "" : " of ", same ? "" : old_name);
1066 }
1067
1068 if (apply_data(patch, &st) < 0)
1069 return error("%s: patch does not apply", old_name);
a577284a 1070 return 0;
fab2c257
LT
1071}
1072
a577284a 1073static int check_patch_list(struct patch *patch)
19c58fb8 1074{
a577284a
LT
1075 int error = 0;
1076
1077 for (;patch ; patch = patch->next)
1078 error |= check_patch(patch);
1079 return error;
1080}
1081
1082static void show_file(int c, unsigned int mode, const char *name)
1083{
1084 printf("%c %o %s\n", c, mode, name);
1085}
3f40315a 1086
a577284a
LT
1087static void show_file_list(struct patch *patch)
1088{
1089 for (;patch ; patch = patch->next) {
1090 if (patch->is_rename) {
1091 show_file('-', patch->old_mode, patch->old_name);
1092 show_file('+', patch->new_mode, patch->new_name);
1093 continue;
1094 }
1095 if (patch->is_copy || patch->is_new) {
1096 show_file('+', patch->new_mode, patch->new_name);
1097 continue;
1098 }
1099 if (patch->is_delete) {
1100 show_file('-', patch->old_mode, patch->old_name);
1101 continue;
1102 }
1103 if (patch->old_mode && patch->new_mode && patch->old_mode != patch->new_mode) {
1104 printf("M %o:%o %s\n", patch->old_mode, patch->new_mode, patch->old_name);
1105 continue;
19c58fb8 1106 }
a577284a
LT
1107 printf("M %o %s\n", patch->old_mode, patch->old_name);
1108 }
1109}
fab2c257 1110
a577284a
LT
1111static void stat_patch_list(struct patch *patch)
1112{
1113 int files, adds, dels;
1114
1115 for (files = adds = dels = 0 ; patch ; patch = patch->next) {
1116 files++;
1117 adds += patch->lines_added;
1118 dels += patch->lines_deleted;
1119 show_stats(patch);
1120 }
1121
1122 printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
3f40315a
LT
1123}
1124
96c912a4
JH
1125static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
1126{
1127 if (mode)
1128 printf(" %s mode %06o %s\n", newdelete, mode, name);
1129 else
1130 printf(" %s %s\n", newdelete, name);
1131}
1132
1133static void show_mode_change(struct patch *p, int show_name)
1134{
1135 if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
1136 if (show_name)
1137 printf(" mode change %06o => %06o %s\n",
1138 p->old_mode, p->new_mode, p->new_name);
1139 else
1140 printf(" mode change %06o => %06o\n",
1141 p->old_mode, p->new_mode);
1142 }
1143}
1144
1145static void show_rename_copy(struct patch *p)
1146{
1147 const char *renamecopy = p->is_rename ? "rename" : "copy";
1148 const char *old, *new;
1149
1150 /* Find common prefix */
1151 old = p->old_name;
1152 new = p->new_name;
1153 while (1) {
1154 const char *slash_old, *slash_new;
1155 slash_old = strchr(old, '/');
1156 slash_new = strchr(new, '/');
1157 if (!slash_old ||
1158 !slash_new ||
1159 slash_old - old != slash_new - new ||
1160 memcmp(old, new, slash_new - new))
1161 break;
1162 old = slash_old + 1;
1163 new = slash_new + 1;
1164 }
1165 /* p->old_name thru old is the common prefix, and old and new
1166 * through the end of names are renames
1167 */
1168 if (old != p->old_name)
1169 printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
e30e814d 1170 (int)(old - p->old_name), p->old_name,
96c912a4
JH
1171 old, new, p->score);
1172 else
1173 printf(" %s %s => %s (%d%%)\n", renamecopy,
1174 p->old_name, p->new_name, p->score);
1175 show_mode_change(p, 0);
1176}
1177
1178static void summary_patch_list(struct patch *patch)
1179{
1180 struct patch *p;
1181
1182 for (p = patch; p; p = p->next) {
1183 if (p->is_new)
1184 show_file_mode_name("create", p->new_mode, p->new_name);
1185 else if (p->is_delete)
1186 show_file_mode_name("delete", p->old_mode, p->old_name);
1187 else {
1188 if (p->is_rename || p->is_copy)
1189 show_rename_copy(p);
1190 else {
1191 if (p->score) {
1192 printf(" rewrite %s (%d%%)\n",
1193 p->new_name, p->score);
1194 show_mode_change(p, 0);
1195 }
1196 else
1197 show_mode_change(p, 1);
1198 }
1199 }
1200 }
1201}
1202
3f40315a
LT
1203static void patch_stats(struct patch *patch)
1204{
1205 int lines = patch->lines_added + patch->lines_deleted;
1206
1207 if (lines > max_change)
1208 max_change = lines;
1209 if (patch->old_name) {
1210 int len = strlen(patch->old_name);
1211 if (len > max_len)
1212 max_len = len;
1213 }
1214 if (patch->new_name) {
1215 int len = strlen(patch->new_name);
1216 if (len > max_len)
1217 max_len = len;
1218 }
19c58fb8
LT
1219}
1220
5aa7d94c
LT
1221static void remove_file(struct patch *patch)
1222{
1223 if (write_index) {
1224 if (remove_file_from_cache(patch->old_name) < 0)
1225 die("unable to remove %s from index", patch->old_name);
1226 }
1227 unlink(patch->old_name);
1228}
1229
1230static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
1231{
1232 struct stat st;
1233 struct cache_entry *ce;
1234 int namelen = strlen(path);
1235 unsigned ce_size = cache_entry_size(namelen);
1236
1237 if (!write_index)
1238 return;
1239
1240 ce = xmalloc(ce_size);
1241 memset(ce, 0, ce_size);
1242 memcpy(ce->name, path, namelen);
1243 ce->ce_mode = create_ce_mode(mode);
1244 ce->ce_flags = htons(namelen);
1245 if (lstat(path, &st) < 0)
1246 die("unable to stat newly created file %s", path);
1247 fill_stat_cache_info(ce, &st);
1248 if (write_sha1_file(buf, size, "blob", ce->sha1) < 0)
1249 die("unable to create backing store for newly created file %s", path);
1250 if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
1251 die("unable to add cache entry for %s", path);
1252}
1253
5c8af185
LT
1254static void create_subdirectories(const char *path)
1255{
1256 int len = strlen(path);
1257 char *buf = xmalloc(len + 1);
1258 const char *slash = path;
1259
1260 while ((slash = strchr(slash+1, '/')) != NULL) {
1261 len = slash - path;
1262 memcpy(buf, path, len);
1263 buf[len] = 0;
f312de01 1264 if (mkdir(buf, 0777) < 0) {
5c8af185
LT
1265 if (errno != EEXIST)
1266 break;
1267 }
1268 }
1269 free(buf);
1270}
1271
1b668341
LT
1272static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
1273{
1274 int fd;
1275
1276 if (S_ISLNK(mode))
1277 return symlink(buf, path);
1278 fd = open(path, O_CREAT | O_EXCL | O_WRONLY | O_TRUNC, (mode & 0100) ? 0777 : 0666);
1279 if (fd < 0)
1280 return -1;
1281 while (size) {
1282 int written = write(fd, buf, size);
1283 if (written < 0) {
1284 if (errno == EINTR || errno == EAGAIN)
1285 continue;
1286 die("writing file %s: %s", path, strerror(errno));
1287 }
1288 if (!written)
1289 die("out of space writing file %s", path);
1290 buf += written;
1291 size -= written;
1292 }
1293 if (close(fd) < 0)
1294 die("closing file %s: %s", path, strerror(errno));
1295 return 0;
1296}
1297
5c8af185
LT
1298/*
1299 * We optimistically assume that the directories exist,
1300 * which is true 99% of the time anyway. If they don't,
1301 * we create them and try again.
1302 */
1b668341 1303static void create_one_file(const char *path, unsigned mode, const char *buf, unsigned long size)
5c8af185 1304{
1b668341
LT
1305 if (!try_create_file(path, mode, buf, size))
1306 return;
5c8af185 1307
1b668341 1308 if (errno == ENOENT) {
5c8af185 1309 create_subdirectories(path);
1b668341
LT
1310 if (!try_create_file(path, mode, buf, size))
1311 return;
5c8af185 1312 }
5c8af185 1313
1b668341
LT
1314 if (errno == EEXIST) {
1315 unsigned int nr = getpid();
5c8af185 1316
1b668341
LT
1317 for (;;) {
1318 const char *newpath;
1319 newpath = mkpath("%s~%u", path, nr);
1320 if (!try_create_file(newpath, mode, buf, size)) {
1321 if (!rename(newpath, path))
1322 return;
1323 unlink(newpath);
1324 break;
1325 }
1326 if (errno != EEXIST)
1327 break;
1328 }
5c8af185 1329 }
1b668341 1330 die("unable to write file %s mode %o", path, mode);
5c8af185
LT
1331}
1332
5aa7d94c
LT
1333static void create_file(struct patch *patch)
1334{
1335 const char *path = patch->new_name;
1336 unsigned mode = patch->new_mode;
1337 unsigned long size = patch->resultsize;
1338 char *buf = patch->result;
1339
1340 if (!mode)
1341 mode = S_IFREG | 0644;
1b668341
LT
1342 create_one_file(path, mode, buf, size);
1343 add_index_file(path, mode, buf, size);
5aa7d94c
LT
1344}
1345
1346static void write_out_one_result(struct patch *patch)
1347{
1348 if (patch->is_delete > 0) {
1349 remove_file(patch);
1350 return;
1351 }
1352 if (patch->is_new > 0 || patch->is_copy) {
1353 create_file(patch);
1354 return;
1355 }
1356 /*
1357 * Rename or modification boils down to the same
1358 * thing: remove the old, write the new
1359 */
1360 remove_file(patch);
1361 create_file(patch);
1362}
1363
d854f783 1364static void write_out_results(struct patch *list, int skipped_patch)
5aa7d94c 1365{
d854f783 1366 if (!list && !skipped_patch)
f7b79707
LT
1367 die("No changes");
1368
5aa7d94c
LT
1369 while (list) {
1370 write_out_one_result(list);
1371 list = list->next;
1372 }
1373}
1374
1375static struct cache_file cache_file;
1376
d854f783
JH
1377static struct excludes {
1378 struct excludes *next;
1379 const char *path;
1380} *excludes;
1381
1382static int use_patch(struct patch *p)
1383{
c7c81b3a 1384 const char *pathname = p->new_name ? p->new_name : p->old_name;
d854f783
JH
1385 struct excludes *x = excludes;
1386 while (x) {
1387 if (fnmatch(x->path, pathname, 0) == 0)
1388 return 0;
1389 x = x->next;
1390 }
1391 return 1;
1392}
1393
c1bb9350
LT
1394static int apply_patch(int fd)
1395{
5aa7d94c 1396 int newfd;
c1bb9350
LT
1397 unsigned long offset, size;
1398 char *buffer = read_patch_file(fd, &size);
19c58fb8 1399 struct patch *list = NULL, **listp = &list;
d854f783 1400 int skipped_patch = 0;
c1bb9350
LT
1401
1402 if (!buffer)
1403 return -1;
1404 offset = 0;
1405 while (size > 0) {
19c58fb8
LT
1406 struct patch *patch;
1407 int nr;
1408
1409 patch = xmalloc(sizeof(*patch));
1410 memset(patch, 0, sizeof(*patch));
1411 nr = parse_chunk(buffer + offset, size, patch);
c1bb9350
LT
1412 if (nr < 0)
1413 break;
d854f783
JH
1414 if (use_patch(patch)) {
1415 patch_stats(patch);
1416 *listp = patch;
1417 listp = &patch->next;
1418 } else {
1419 /* perhaps free it a bit better? */
1420 free(patch);
1421 skipped_patch++;
1422 }
c1bb9350
LT
1423 offset += nr;
1424 size -= nr;
1425 }
19c58fb8 1426
5aa7d94c
LT
1427 newfd = -1;
1428 write_index = check_index && apply;
1429 if (write_index)
1430 newfd = hold_index_file_for_update(&cache_file, get_index_file());
1431 if (check_index) {
1432 if (read_cache() < 0)
1433 die("unable to read index file");
1434 }
1435
a577284a
LT
1436 if ((check || apply) && check_patch_list(list) < 0)
1437 exit(1);
1438
5aa7d94c 1439 if (apply)
d854f783 1440 write_out_results(list, skipped_patch);
5aa7d94c
LT
1441
1442 if (write_index) {
1443 if (write_cache(newfd, active_cache, active_nr) ||
1444 commit_index_file(&cache_file))
1445 die("Unable to write new cachefile");
1446 }
1447
a577284a
LT
1448 if (show_files)
1449 show_file_list(list);
1450
1451 if (diffstat)
1452 stat_patch_list(list);
19c58fb8 1453
96c912a4
JH
1454 if (summary)
1455 summary_patch_list(list);
1456
c1bb9350
LT
1457 free(buffer);
1458 return 0;
1459}
1460
1461int main(int argc, char **argv)
1462{
1463 int i;
4dfdbe10 1464 int read_stdin = 1;
c1bb9350 1465
c1bb9350
LT
1466 for (i = 1; i < argc; i++) {
1467 const char *arg = argv[i];
1468 int fd;
1469
1470 if (!strcmp(arg, "-")) {
1471 apply_patch(0);
4dfdbe10 1472 read_stdin = 0;
c1bb9350
LT
1473 continue;
1474 }
d854f783
JH
1475 if (!strncmp(arg, "--exclude=", 10)) {
1476 struct excludes *x = xmalloc(sizeof(*x));
1477 x->path = arg + 10;
1478 x->next = excludes;
1479 excludes = x;
1480 continue;
1481 }
12dd6e8c 1482 /* NEEDSWORK: this does not do anything at this moment. */
c1bb9350
LT
1483 if (!strcmp(arg, "--no-merge")) {
1484 merge_patch = 0;
1485 continue;
1486 }
fab2c257 1487 if (!strcmp(arg, "--stat")) {
a577284a 1488 apply = 0;
fab2c257
LT
1489 diffstat = 1;
1490 continue;
1491 }
96c912a4
JH
1492 if (!strcmp(arg, "--summary")) {
1493 apply = 0;
1494 summary = 1;
1495 continue;
1496 }
a577284a
LT
1497 if (!strcmp(arg, "--check")) {
1498 apply = 0;
1499 check = 1;
1500 continue;
1501 }
3cca928d
LT
1502 if (!strcmp(arg, "--index")) {
1503 check_index = 1;
1504 continue;
1505 }
aefa4a5b
LT
1506 if (!strcmp(arg, "--apply")) {
1507 apply = 1;
1508 continue;
1509 }
a577284a
LT
1510 if (!strcmp(arg, "--show-files")) {
1511 show_files = 1;
1512 continue;
1513 }
c1bb9350
LT
1514 fd = open(arg, O_RDONLY);
1515 if (fd < 0)
1516 usage(apply_usage);
4dfdbe10 1517 read_stdin = 0;
c1bb9350
LT
1518 apply_patch(fd);
1519 close(fd);
1520 }
4dfdbe10
LT
1521 if (read_stdin)
1522 apply_patch(0);
c1bb9350
LT
1523 return 0;
1524}